English
 
联系方式:

馆长:张奠湘
电话/传真:020-3725-2543
电子邮箱:dx-zhang@scbg.ac.cn

馆长助理:曾飞燕
电话/传真:020-3725-2692
     020-3725-2548
电子邮箱:zengfeiy@scbg.ac.cn

地址:广州市天河区兴科路723号
邮编:510650
 
 
首 页 | 标本馆介绍 | 前贤风范 | 研究团队 | 科研成果 | 最新进展 | 标本馆新闻 | 管理规范 | 领导关怀
  现在的位置:首页>最新进展  
Low genetic diversity and high genetic divergence caused by inbreeding and geographical isolation in
2014-07-27 | 编辑: | 【 】【打印 】【 关闭

Wei Gong, Lei Gu, Dianxiang Zhang. 2010 Conservation Genetics 11(6): 2281-2288.

Abstract: Loropetalum subcordatum (Hamamelidaceae) is one of the most endangered angiosperm species in China. It is narrowly distributed in a few localities in the evergreen broadleaved forest of southern China. Up to now only a few dozen remnant individuals have been found in the four extant populations. In this project, we studied its genetic diversity and population genetic structure using the high resolution molecular marker of amplified fragment length polymorphism. In total, 47 individuals from all the four populations (including all individuals in three populations) were analyzed. Comparably low genetic diversity within populations was revealed and significantly high genetic differentiation among the populations was detected. Four independent groups were identified which corresponded with their geographical ranges. Autogamy is considered to be the major factor contributing to the low genetic variation and high genetic divergence within this species. In addition, small population size, restricted distribution range, geographical isolation and limited seed dispersal may also contribute to the low genetic diversity and high population genetic differentiation. Clonal reproduction was inferred to occur in the two island populations. Suggestions for conservation strategies are provided to preserve the genetic resources of this species.

 

版权所有:中国科学院华南植物园
网站管理员:张征、汤银珠